public class z2022030103037 {
    public static void main(String[] args) {
        System.out.println("这是A功能\n");

        System.out.println("aaaa");
        System.out.println("这是aaa功能\n");
        System.out.println("这是B功能\n");
        System.out.println("这是d功能\n");


    }
}
